CN116992741B - Method, device, medium and equipment for checking strength of gearbox shell - Google Patents
Method, device, medium and equipment for checking strength of gearbox shell Download PDFInfo
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- CN116992741B CN116992741B CN202311248324.2A CN202311248324A CN116992741B CN 116992741 B CN116992741 B CN 116992741B CN 202311248324 A CN202311248324 A CN 202311248324A CN 116992741 B CN116992741 B CN 116992741B
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000005452 bending Methods 0.000 claims abstract description 47
- 230000001133 acceleration Effects 0.000 claims abstract description 36
- 238000010008 shearing Methods 0.000 claims abstract description 27
- 238000004364 calculation method Methods 0.000 claims abstract description 18
- 230000008093 supporting effect Effects 0.000 claims abstract description 17
- 238000010586 diagram Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 2
- 238000012795 verification Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 230000036461 convulsion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The present disclosure relates to a strength check method, apparatus, medium and device for a gearbox housing. The method comprises the following steps: constructing a gearbox shell finite element model, wherein the gearbox shell finite element model comprises a gearbox shell three-dimensional model; loading a gearbox inertia force on a three-dimensional model of a gearbox shell, loading a target shearing force and a target bending moment on a connecting surface of the gearbox and an engine, wherein the gearbox inertia force is parallel to the direction of acceleration generated by a vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface; obtaining a stress cloud picture of the gearbox shell through finite element calculation; and checking the strength of the gearbox shell according to the stress cloud chart. The method and the device avoid the problem that the three-dimensional engine model is difficult to acquire, and avoid the problem that the relation of parts is complex due to the fact that the three-dimensional engine model is introduced, and further solve the problem that the calculated amount is large.
Description
Technical Field
The disclosure relates to the technical field of gearboxes, in particular to a strength checking method, a device, a medium and equipment for a gearbox shell.
Background
The gearbox is hard-wired to the engine by bolts, which are called the powertrain. When the whole vehicle is tested, the power performance of the vehicle under the 28 working conditions needs to be verified, wherein the working conditions comprise rapid acceleration, rapid deceleration, rapid turning, rapid bumping and the like, and at the moment, the power assembly can bear inertial force caused by acceleration in different directions and can be decomposed into three directions of X (parallel to the width of the vehicle body), Y (parallel to the height of the vehicle body) and Z (parallel to the length of the vehicle body). Because the suspension points are positioned at the front end and the rear end of the power assembly and are far away, when the direction of the inertia force is the X direction and the Y direction, the bending moment required to be born by the power assembly structure is larger because the self weight of the power assembly is larger, and the bending moment is born by the engine and the gearbox shell, so that the influence on the structural strength of the shell is larger.
The existing finite element strength checking method is that the mass of the gearbox is concentrated to the mass center, and then the mass is singly subjected to strength analysis, so that the influence on the bearing caused by connection with an engine is not considered, the analysis method cannot accurately check, the Z-direction mass distribution of the gearbox is uneven, and the inaccuracy of checking is aggravated. If the finite element strength check is carried out on the power assembly at the same time, the relation of parts is complex, the calculation amount of solving is large, and for a gearbox manufacturer, the three-dimensional model of the engine is difficult to obtain due to secret.
Disclosure of Invention
In order to solve the technical problems described above, or at least partially solve the technical problems described above, the present disclosure provides a strength checking method, apparatus, medium, and device for a transmission housing.
The present disclosure provides a strength check method for a gearbox housing, comprising:
constructing a gearbox shell finite element model, wherein the gearbox shell finite element model comprises a gearbox shell three-dimensional model;
loading a gearbox inertia force on the three-dimensional model of the gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and an engine, wherein the gearbox inertia force is parallel to the direction of acceleration generated by a vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface;
obtaining a stress cloud picture of the gearbox shell through finite element calculation;
and checking the strength of the gearbox shell according to the stress cloud chart.
In some embodiments, the gearbox inertial force includes a housing inertial force and an internal component inertial force; loading a gearbox inertial force on the three-dimensional model of the gearbox housing, comprising:
loading the shell inertia force on the gearbox shell, wherein the shell inertia force is distributed force with different concentration;
and loading the internal part inertia force on a supporting shaft of the gearbox, wherein the internal part inertia force is a concentrated force.
In some embodiments, the method further comprises:
and obtaining the shell inertia force and the internal part inertia force through stress analysis of the power assembly under the target working condition, wherein the power assembly comprises the engine and the gearbox.
In some embodiments, the method further comprises:
taking the product of the density of the gearbox housing, the volume of the gearbox housing and the acceleration as the housing inertial force.
In some embodiments, the method further comprises:
determining the stress condition of the power assembly through stress analysis of the power assembly under the target working condition, wherein the power assembly comprises the engine and the gearbox;
drawing a shear diagram and a bending moment diagram of the power assembly according to the stress condition;
determining the target shear force according to the shear force diagram;
and determining the target bending moment according to the bending moment diagram.
In some embodiments, checking the strength of the gearbox housing from the stress cloud comprises:
according to the stress cloud picture, determining equivalent stress corresponding to the weakest part of the gearbox shell;
if the equivalent stress is smaller than the allowable stress, judging that the strength of the gearbox shell meets the strength requirement of the target working condition;
and if the equivalent stress is greater than or equal to the allowable stress, judging that the strength of the gearbox shell does not meet the strength requirement of the target working condition.
In some embodiments, the method further comprises:
and if the strength of the gearbox shell is judged to not meet the strength requirement of the target working condition, adjusting the design parameters of the gearbox shell so that the strength of the gearbox shell meets the strength requirement of the target working condition.
The present disclosure provides a strength check device of a transmission housing, comprising:
the finite element model construction module is used for constructing a finite element model of the gearbox shell, wherein the finite element model of the gearbox shell comprises a three-dimensional model of the gearbox shell;
the force and bending moment loading module is used for loading a gearbox inertia force on the three-dimensional model of the gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and the engine, wherein the gearbox inertia force is parallel to the direction of acceleration of a vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface;
the stress cloud image calculation module is used for obtaining a stress cloud image of the gearbox shell through finite element calculation;
and the strength checking module is used for checking the strength of the gearbox shell according to the stress cloud image.
The present disclosure also provides a computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of the methods provided by the present disclosure.
The present disclosure also provides an electronic device, characterized by comprising:
one or more processors;
a memory for storing one or more programs or instructions;
the processor is configured to perform the steps of the methods provided by the present disclosure by invoking a program or instruction stored in the memory.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
according to the technical scheme provided by the embodiment of the disclosure, the target shearing force and the target bending moment are loaded on the connecting surface of the gearbox and the engine, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the acceleration direction, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface, so that the influence of the engine on the bearing of the gearbox shell is simulated, an engine three-dimensional model is not required, and the problem that the engine three-dimensional model is difficult to acquire is avoided; meanwhile, the problem that the solving calculation amount is large due to complex arrangement of the relation of parts caused by introduction of the three-dimensional model of the engine is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a method of strength check for a transmission housing provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a powertrain according to an embodiment of the present disclosure in a force direction under a target condition;
FIG. 3 is a shear diagram of a powertrain provided by an embodiment of the present disclosure;
FIG. 4 is a bending moment diagram of a powertrain provided by an embodiment of the present disclosure;
FIG. 5 is a finite element analysis schematic of a transmission housing provided by an embodiment of the present disclosure;
FIG. 6 is a block diagram of a strength check device for a transmission housing provided in an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
Fig. 1 is a flowchart of a strength check method for a gearbox housing provided in an embodiment of the present disclosure. The method may be performed by a strength checking device of the gearbox housing, wherein the device may be implemented in software and/or hardware, typically integrated in an electronic device. As shown in fig. 1, the method includes:
s110, constructing a finite element model of the gearbox shell.
Wherein the gearbox housing finite element model comprises a gearbox housing three-dimensional model. For example, to ensure reliability of the strength of the transmission housing, a three-dimensional model of the transmission housing should be constructed from an actual model of the transmission housing. Specifically, a three-dimensional model of the gearbox housing can be built by using three-dimensional modeling software (e.g., creo), and meanwhile, the three-dimensional model of the gearbox housing can be simplified by using the three-dimensional modeling software, for example, oil duct holes, integrated valve seats, oil drain ports, chamfers and other structures are removed. And then, the constructed three-dimensional model of the gearbox housing is imported into finite element analysis software (such as ANSYS Workbench) to obtain the finite element model of the gearbox housing. Specifically, the three-dimensional model of the gearbox housing can be stored as an X_T format in three-dimensional modeling software, a model file in the X_T format is obtained, the model file in the X_T format is opened in finite element analysis software, so that the three-dimensional model of the gearbox housing is imported into the finite element analysis software, and design parameters of the gearbox housing, such as materials, elastic modulus, density and the like of the gearbox housing, are set through the finite element analysis software, and the finite element model of the gearbox housing is constructed.
S120, loading a gearbox inertia force on the three-dimensional model of the gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and the engine.
The inertia force of the gearbox is parallel to the direction of acceleration of the vehicle under the target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface.
In this embodiment, the target condition may be any one of the 28 conditions (because it is impossible to exhaust all the conditions during the calculation, 28 representative conditions are usually adopted to perform the calculation, including 16 typical conditions and 12 limiting conditions, which are abbreviated as 28 conditions), so that the strength of the gearbox housing under some or all of the 28 conditions can be checked. The acceleration is the combined acceleration of the gravitational acceleration to which the gearbox is subjected and other accelerations under the target working condition (such as centrifugal acceleration during a sharp turn or vertical acceleration during a jerk, etc.), and the inertial force of the gearbox is generated by the mass of the gearbox (including the mass of the shell, the mass of the shell fastening, the mass of the gearbox oil and the mass of the rotating parts) under the action of the acceleration.
In checking the strength of the gearbox housing, the influence of the engine connected to the gearbox on the bearing of the gearbox housing should be taken into account in addition to the above-mentioned gearbox inertia forces. However, it is difficult for a gearbox manufacturer to acquire the three-dimensional model of the engine, and even if the three-dimensional model of the engine is acquired, finite element strength check is performed on the engine and the gearbox at the same time, so that the calculation amount of solving is large because the relation of parts is set to be complex. Therefore, in the embodiment, under the condition that the three-dimensional engine model is not used, the influence of the engine on the bearing of the gearbox shell is simulated through the target shearing force and the target bending moment, so that the problem that the three-dimensional engine model is difficult to acquire is avoided, the problem that the relation of parts is complex due to the fact that the three-dimensional engine model is introduced is avoided, and the problem that the calculation amount of solving is large is further solved.
Based on the above examples, in one embodiment, the gearbox inertia forces include a housing inertia force and an internal component inertia force; loading a gearbox inertial force on a three-dimensional model of a gearbox housing, comprising: loading a shell inertia force on a gearbox shell, wherein the shell inertia force is distributed force with different concentration; and loading the inertia force of the internal parts on the supporting shaft of the gearbox, wherein the inertia force of the internal parts is concentrated force.
Optionally, the shell inertia force and the internal part inertia force are obtained through stress analysis of the power assembly under the target working condition, wherein the power assembly comprises an engine and a gearbox.
Specifically, referring to fig. 2, when the direction of the acceleration is the Y direction (for convenience of explanation, only the Y direction is taken as an example), a section of the YOZ plane of the powertrain is selected, the connection surface of the engine and the gearbox is a, and the suspension point 1 and the suspension point 2 of the powertrain are located at the front and rear ends. Dividing the inertia force of the gearbox into a shell inertia force and an internal part inertia force, wherein the shell inertia force is generated by a shell, a shell fixedly connected piece (a non-rotating piece) and the quality of oil of the gearbox; the internal part inertia force is generated by the rotating part mass acting through the input shaft at the support bearing, as shown in fig. 2, and is generated by the concentrated force F a1 And F a2 The inertia force of the shell is uniformly distributed by different concentrations at the position of the supporting shaft of the gearbox t Acting on the gearbox housing; the stress of the suspension point 2 is F R2 A rubber pad is mounted at the suspension point 2, allowing small displacement in the Z direction, so that the influence of the Z force is not taken into account. The engine inertia force is mainly generated by the shell, the shell fixing piece and the engine oil mass (the mass of the transmission shaft is negligible compared with the shell and the fixing piece), as shown in fig. 2, the engine inertia force is generated by uniformly distributing forces F with different concentrations g Acting on the engine housing; the stress of the suspension point 1 is F R1 A rubber pad is mounted at the suspension point 1, allowing small displacement in the Z direction, so that the influence of the Z force is not considered. Thus, the power assembly is under the target working conditionAnd the force is analyzed to obtain a shell inertia force and an internal part inertia force, the shell inertia force can be determined according to the force condition, the density of the gearbox shell can be set during specific implementation, the product of the density of the gearbox shell, the volume of the gearbox shell and the acceleration is taken as the shell inertia force, and the internal part inertia force is loaded on a supporting shaft of the gearbox, so that the loading of the gearbox inertia force is completed.
Further, in one embodiment, the method may further comprise: determining the stress condition of the power assembly through stress analysis of the power assembly under a target working condition, wherein the power assembly comprises an engine and a gearbox; drawing a shear diagram and a bending moment diagram of the power assembly according to the stress condition; determining a target shear force according to the shear force diagram; and determining the target bending moment according to the bending moment diagram. For example, as shown in fig. 3 and 4, a working condition of-6 g of Y-direction acceleration is selected, g is gravity acceleration, a shearing force diagram and a bending moment diagram are made according to the stress condition of the power assembly, and the shearing force F applied to the connecting surface A can be determined according to the shearing force diagram SA I.e. the target shear force, and the bending moment M suffered at the connecting surface A can be determined by the bending moment diagram A I.e. the target bending moment. Further, as shown in fig. 5, a constraint condition of the transmission is defined, that is, a suspension point of the transmission is fixedly constrained, and a target shearing force F is applied to a connection surface between the transmission and the engine SA Target bending moment M A To utilize the target shearing force F SA Simulating the supporting effect of the engine on the gearbox shell in the acceleration direction and utilizing the target bending moment M A The influence of the engine on the deformation of the connecting surface is simulated, so that the influence of the engine on the bearing of the gearbox housing is simulated. At the same time concentrate force F a1 And F a2 Applied to the support bearing to load the internal component inertial forces. In addition, by means of the density of the arranged gearbox shell and the volume of the gearbox shell determined by the three-dimensional model of the gearbox shell, the shell inertia force can be simulated, and loading of the shell inertia force can be achieved.
It can be understood that the stress analysis method under other working conditions is similar, and only the force in the acceleration direction is needed to be obtained for analysis.
S130, obtaining a stress cloud picture of the gearbox shell through finite element calculation.
After loading of the inertia force, the target shearing force and the target bending moment of the gearbox is completed, the stress cloud diagram of the gearbox shell can be calculated by directly adopting the finite element model of the gearbox shell, and the strength of the gearbox shell can be analyzed according to the stress cloud diagram.
And S140, checking the strength of the gearbox shell according to the stress cloud chart.
In one embodiment, checking the strength of a gearbox housing from a stress cloud comprises: determining equivalent stress corresponding to the weakest part of the gearbox shell according to the stress cloud chart; if the equivalent stress is smaller than the allowable stress, judging that the strength of the gearbox shell meets the strength requirement of the target working condition; and if the equivalent stress is greater than or equal to the allowable stress, judging that the strength of the gearbox shell does not meet the strength requirement of the target working condition.
Optionally, if it is determined that the strength of the gearbox housing does not meet the strength requirement of the target working condition, the design parameters of the gearbox housing are adjusted so that the strength of the gearbox housing meets the strength requirement of the target working condition. Specifically, when the strength of the gearbox housing does not meet the strength requirement of the target working condition, the design parameters of the gearbox housing are adjusted, then the steps S120 to S140 are repeated, if the strength of the gearbox housing does not meet the strength requirement of the target working condition, the design parameters of the gearbox housing are continuously adjusted, and the steps S120 to S140 are repeated until the strength of the gearbox housing does not meet the strength requirement of the target working condition. In addition, after the strength of the gearbox housing under the current target working condition is checked, other target working conditions can be set, and the strength of the gearbox housing is checked under the other target working conditions, so that the strength of the gearbox housing meets the strength requirements of all the 28 working conditions.
According to the strength checking method for the gearbox shell, the target shearing force and the target bending moment are loaded on the connecting surface of the gearbox and the engine, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the acceleration direction, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface, so that the influence of the engine on the bearing of the gearbox shell is simulated, an engine three-dimensional model is not required, and the problem that the engine three-dimensional model is difficult to acquire is avoided; meanwhile, the problem that the solving calculation amount is large due to complex arrangement of the relation of parts caused by introduction of the three-dimensional model of the engine is avoided.
Corresponding to the strength checking method of the gearbox housing provided by the embodiment of the disclosure, the embodiment of the disclosure also provides a strength checking device of the gearbox housing. Fig. 6 is a block diagram of a strength checking device for a gearbox housing according to an embodiment of the present disclosure, as shown in fig. 6, the strength checking device for a gearbox housing includes:
a finite element model building module 21 for building a gearbox housing finite element model, wherein the gearbox housing finite element model comprises a gearbox housing three-dimensional model;
the force and bending moment loading module 22 is used for loading a gearbox inertia force on the three-dimensional model of the gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and the engine, wherein the gearbox inertia force is parallel to the direction of acceleration of the vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface;
the stress cloud image calculation module 23 is used for obtaining a stress cloud image of the gearbox shell through finite element calculation;
and the strength checking module 24 is used for checking the strength of the gearbox housing according to the stress cloud chart.
In some embodiments, the gearbox inertial force includes a housing inertial force and an internal component inertial force; the force and bending moment loading module 22 is configured to:
loading a shell inertia force on a gearbox shell, wherein the shell inertia force is distributed force with different concentration;
and loading the inertia force of the internal parts on the supporting shaft of the gearbox, wherein the inertia force of the internal parts is concentrated force.
In some embodiments, the apparatus further comprises a gearbox inertial force acquisition module for:
and obtaining the shell inertia force and the inertia force of internal parts by analyzing the stress of the power assembly under the target working condition, wherein the power assembly comprises an engine and a gearbox.
In some embodiments, the apparatus further comprises a housing inertial force simulation module for:
the product of the density of the gearbox housing, the volume of the gearbox housing and the acceleration is taken as the housing inertia force.
In some embodiments, the apparatus further comprises a drawing module for:
determining the stress condition of the power assembly through stress analysis of the power assembly under a target working condition, wherein the power assembly comprises an engine and a gearbox;
drawing a shear diagram and a bending moment diagram of the power assembly according to the stress condition;
determining a target shear force according to the shear force diagram;
and determining the target bending moment according to the bending moment diagram.
In some embodiments, the intensity verification module 24 is to:
determining equivalent stress corresponding to the weakest part of the gearbox shell according to the stress cloud chart;
if the equivalent stress is smaller than the allowable stress, judging that the strength of the gearbox shell meets the strength requirement of the target working condition;
and if the equivalent stress is greater than or equal to the allowable stress, judging that the strength of the gearbox shell does not meet the strength requirement of the target working condition.
In some embodiments, the apparatus further comprises a parameter adjustment module for:
and if the strength of the gearbox shell is judged to not meet the strength requirement of the target working condition, adjusting the design parameters of the gearbox shell so that the strength of the gearbox shell meets the strength requirement of the target working condition.
The strength checking device for the gearbox housing disclosed in the above embodiments can execute the strength checking method for the gearbox housing disclosed in each embodiment, and has the same or corresponding beneficial effects, and in order to avoid repetition, the description is omitted here.
The disclosed embodiments also provide a computer-readable storage medium storing a program or instructions that cause a computer to perform the steps of any of the methods described above.
Illustratively, the program or instructions cause a computer to perform a method of strength checking of a gearbox housing, the method comprising:
constructing a gearbox shell finite element model, wherein the gearbox shell finite element model comprises a gearbox shell three-dimensional model;
loading a gearbox inertia force on a three-dimensional model of a gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and an engine, wherein the gearbox inertia force is parallel to the direction of acceleration generated by a vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface;
obtaining a stress cloud picture of the gearbox shell through finite element calculation;
and checking the strength of the gearbox shell according to the stress cloud chart.
Optionally, the computer executable instructions, when executed by the computer processor, may also be used to implement the technical solution of the strength checking method for any gearbox housing provided by the embodiments of the present disclosure, so as to achieve the corresponding beneficial effects.
From the above description of embodiments, it will be apparent to those skilled in the art that the disclosed embodiments may be implemented by means of software and necessary general purpose hardware, but may of course also be implemented by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the embodiments of the present disclosure may be embodied in essence or a portion contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, etc., including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.), to perform the method described in the embodiments of the present disclosure.
The embodiment of the disclosure also provides an electronic device, including: one or more processors; a memory for storing one or more programs or instructions; the processor is used for executing the steps of any one of the methods by calling the program or the instruction stored in the memory, so as to realize the corresponding beneficial effects.
Fig. 7 is a schematic hardware structure of an electronic device according to an embodiment of the disclosure. As shown in fig. 7, the electronic device includes one or more processors 301 and memory 302.
The processor 301 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities and may control other components in the electronic device to perform desired functions.
Memory 302 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that can be executed by the processor 301 to implement the strength checking method of the transmission housing of the embodiments of the present disclosure described above, and/or other desired functions. Various contents such as an input signal, a signal component, a noise component, and the like may also be stored in the computer-readable storage medium.
In one example, the electronic device may further include: an input device 303, and an output device 304, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
In addition, the input device 303 may also include, for example, a keyboard, a mouse, and the like.
The output device 304 may output various information to the outside, including the determined distance information, direction information, and the like. The output device 304 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device relevant to the present disclosure are shown in fig. 7 for simplicity, components such as buses, input/output interfaces, and the like being omitted. In addition, the electronic device may include any other suitable components depending on the particular application.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of strength verification of a transmission housing, comprising:
constructing a gearbox shell finite element model, wherein the gearbox shell finite element model comprises a gearbox shell three-dimensional model;
loading a gearbox inertia force on the three-dimensional model of the gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and an engine, wherein the gearbox inertia force is parallel to the direction of acceleration generated by a vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface;
obtaining a stress cloud picture of the gearbox shell through finite element calculation;
and checking the strength of the gearbox shell according to the stress cloud chart.
2. The method of claim 1, wherein the gearbox inertial force comprises a housing inertial force and an internal component inertial force; loading a gearbox inertial force on the three-dimensional model of the gearbox housing, comprising:
loading the shell inertia force on the gearbox shell, wherein the shell inertia force is distributed force with different concentration;
and loading the internal part inertia force on a supporting shaft of the gearbox, wherein the internal part inertia force is a concentrated force.
3. The method according to claim 2, wherein the method further comprises:
and obtaining the shell inertia force and the internal part inertia force through stress analysis of the power assembly under the target working condition, wherein the power assembly comprises the engine and the gearbox.
4. The method according to claim 2, wherein the method further comprises:
taking the product of the density of the gearbox housing, the volume of the gearbox housing and the acceleration as the housing inertial force.
5. The method according to claim 1, wherein the method further comprises:
determining the stress condition of the power assembly through stress analysis of the power assembly under the target working condition, wherein the power assembly comprises the engine and the gearbox;
drawing a shear diagram and a bending moment diagram of the power assembly according to the stress condition;
determining the target shear force according to the shear force diagram;
and determining the target bending moment according to the bending moment diagram.
6. The method of claim 1, wherein checking the strength of the gearbox housing from the stress cloud comprises:
according to the stress cloud picture, determining equivalent stress corresponding to the weakest part of the gearbox shell;
if the equivalent stress is smaller than the allowable stress, judging that the strength of the gearbox shell meets the strength requirement of the target working condition;
and if the equivalent stress is greater than or equal to the allowable stress, judging that the strength of the gearbox shell does not meet the strength requirement of the target working condition.
7. The method of claim 6, wherein the method further comprises:
and if the strength of the gearbox shell is judged to not meet the strength requirement of the target working condition, adjusting the design parameters of the gearbox shell so that the strength of the gearbox shell meets the strength requirement of the target working condition.
8. A strength check device for a transmission housing, comprising:
the finite element model construction module is used for constructing a finite element model of the gearbox shell, wherein the finite element model of the gearbox shell comprises a three-dimensional model of the gearbox shell;
the force and bending moment loading module is used for loading a gearbox inertia force on the three-dimensional model of the gearbox shell, and loading a target shearing force and a target bending moment on a connecting surface of the gearbox and the engine, wherein the gearbox inertia force is parallel to the direction of acceleration of a vehicle under a target working condition, the target shearing force is used for simulating the supporting effect of the engine on the gearbox shell in the direction of the acceleration, and the target bending moment is used for simulating the influence of the engine on the deformation of the connecting surface;
the stress cloud image calculation module is used for obtaining a stress cloud image of the gearbox shell through finite element calculation;
and the strength checking module is used for checking the strength of the gearbox shell according to the stress cloud image.
9. A computer readable storage medium storing a program or instructions for causing a computer to perform the steps of the method according to any one of claims 1 to 7.
10. An electronic device, comprising:
one or more processors;
a memory for storing one or more programs or instructions;
the processor is adapted to perform the steps of the method according to any of claims 1 to 7 by invoking a program or instruction stored in the memory.
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| CN202311248324.2A CN116992741B (en) | 2023-09-26 | 2023-09-26 | Method, device, medium and equipment for checking strength of gearbox shell |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111488662A (en) * | 2020-04-21 | 2020-08-04 | 长沙酷哇人工智能及大数据产业技术研究院有限公司 | Method for detecting sealing performance of shell joint surface |
| CN115310222A (en) * | 2022-07-19 | 2022-11-08 | 东风汽车集团股份有限公司 | Strength analysis method for gearbox shell |
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| GB0807778D0 (en) * | 2008-04-29 | 2008-06-04 | Romax Technology Ltd | Apparatus and method for improving radial stresses in a gear transmission mounting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111488662A (en) * | 2020-04-21 | 2020-08-04 | 长沙酷哇人工智能及大数据产业技术研究院有限公司 | Method for detecting sealing performance of shell joint surface |
| CN115310222A (en) * | 2022-07-19 | 2022-11-08 | 东风汽车集团股份有限公司 | Strength analysis method for gearbox shell |
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| Title |
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| 基于有限元分析的变速器壳体强度分析及优化设计;黄德健;吴昌兵;杨连波;;企业科技与发展(第13期);第31页2.3节 * |
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